Roof and floor construction



June 21; 1932.

c. -A. MARTIN 1,864,025

ROOF AND FLOOR CONSTRUCTION Filed Nov. 18, 1926 Charles Juanan, @www Patented June 21, 1932 UNITED sTATEs PATENT OFFICE CHARLES A. MARTIN, OF DETROIT, MICHIGAN, ASSIGNOR TO ANCHOR FIREPROOFING COMPANY, F DETROIT, MICHIGAN, A. CORPORATION OF MICHIGAN ROOF AND FLOOR CONSTRUCTION Application led November 18, 1926. Serial No. 149,188.

This invention relates to roof and ioor construction and refers more particularly to an improved roof and floor construction of the type in which a plastic mass is poured in place.

Among the objects of the invention are: to provide an improved roof and floor construction in which the necessity for temporary supports is avoided and which will be self-supporting both while the plastic is being poured and after it is set. The invention further resides in such features of construction and arrangements and combinations of parts as will more fully hereinafter appear.

In the drawing in which I have illustrated one embodiment of my invention:

Figure 1 is a fragmentary elevational View of a roof and floor construction partly in section;

Figure 2 is a transverse vertical section through one of the beam girders;

Figure 3 is a view at right angles to Figure 2;

Figure 4 is a view similar to Figure 2 butV showing a slight modification;

Figure 5 is an enlarged sectional View of the construction shown in Figure 4.

Describing in detail 'the construction shown in the drawing, 1 designates the beam girder or purlin which is the supporting structural frame for the floor or roof. Extending at right angles to the supporting structural steel members 1 are light rails 2 which are bolted or otherwise suitably secured to the supporting girders or purlins 1. These rails are preferably located a predetermined distance apart and interposed between the adjacent rails 2 is a plaster board member 3. This plaster board is of suiiicient thickness to span between the rails without undue deliection when the plastic mass is poured. The thickness and strength of the plaster board should be so related to the distance apart of the rails 2 that the plaster board will itself Yform the 5 support for the plastic mass While being poured, at least in combination with the reinforcement 4.

The latter, as shown in Figure 1, is an electrically welded wire mat and is of substantially the same width as the plaster board so that its return-bent ends 5 are adjacent the vertical Web 6 of the rails 2 and rest directly on the plaster board which in turn rests on the lower iange 7 of the rails 2. It is to be noted that each of these plaster board and reinforcement sections forms a separate unit from that on the opposite side of the rails 2 so that the structure can be rapidly and economi'cally formed and laid in place. A plastic filling 8 is then poured on top of the plaster board 3 and surrounds the reinforcement 4 so that when the plastic mass sets the plaster board, reinforcement and poured plastic mass form a solid unit having great strength.

In the construction shown in Figures 4 and 5, the same beam or girders l, rails 2, reinforcement 4 and plastic mass 8 are employed but the plaster board base 3 is of slightly different construction. As shown in the enlarged view 5 the one end of the plaster board 3 is formed in a wedge sha e 9 which is adapted to t into a correspon ing groove 10 in the end of the adjacent plaster board. In this construction the joints of the material are dove-tailed instead of being square-edged and this arrangement gives added strength at the juncture of the two plaster boards so that if one board has a greater amount of Weight on it than the board adjacent it, vpart of the load will be distributed to the adjacent board by means of the dove-tailed joint.

In both the constructions shown in Figures 1, 2l and 3 and that shown in Figures 4 and 5 the plaster board is of such predetermined thickness and strength with reference to the distance to be spanned and the load to be carried in pouring, that the roof will be self-supporting and no temporary supports will be necessary in forming the roof. I do not, however, desire to limit my invention to the particular details of construction and combination of parts except as set forth in the claim.

What I claim as my invention is:

A floor or roof construction comprising supporting girders, rails extending transversely of said girders, plaster board resting on the transverse rails, reinforcing means including a Wire mat resting upon said plaster board and having return bent end portions engageable With the Webs of said rails and a plastic filler poured on to said plaster board and embedding said Wire mat.

In testimony whereof I alix m signature.

CHARLES A.V BlARTIN.

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